Italian researcher: symbols found in 'Mona Lisa'

Forget her smile. An Italian researcher says the key to solving the enigmas of "Mona Lisa'" lies in her eyes.
Silvano Vinceti claims he has found the letter "S" in the woman's left eye, the letter "L" in her right eye, and the number "72" under the arched bridge in the backdrop of Leonardo da Vinci's famous painting. According to the researcher, the symbols open up new leads to identifying the model, dating the painting, and attesting to Leonardo's interest in religion and mysticism.